出处：按学科分类—语言、文字 中国对外翻译出版公司《汉英成语词典》第60页（242字）
比喻敌人的爪牙、不中用的头目和走卒，例由于事先走漏风声，使这次剿匪行动只捉到一些虾兵蟹将，而未能逮捕真正为首作恶的歹徒。
The bandits got wind of the round up and only a few stragglers were therefore sought while the main force and its leaders got away．